Strip-gummed paper and process of making same



March 1 1927.

w. w. M LAURIN STRIP GUMMED PAPER AND PHOCESS OF MAKING SAME Original Filed Oct. 8, 1924 the supply being held in Patented Mar. 1, 1927.

WILLIAM w. MQLAURIN,

JONES 00., or Bnooxrmrm,

SETTB.

OF BROOKFIELD, MASSACHUSETTS, ASSIGNOR TO MGLAUBIN- MASSACHUSETTS, A

CORPORATION OF MASSACHU- STRIP-GUMMED YAI'ER AND PROCESS OF MAKING SAME.

Application filed October 8, 1924, SeriaI No. 742,875. Renewed December 14, 1928.

posters, and

gummed, ummed.

sheet of paper is thicker than the ungummed portion of the sheet. While this difference 1n thickness is of no importance in an individual sheet, it does become a troublesome factor when the sheets are stacked, and troublesome in printing strip gummed labels because the stack is necessarily higher on one side than the other. This makes the stack unstable and it also 1nterferes with the operation of certain types of sheet feeding mechanisms used in printing machines.

invention has for its chief ob-' The present ject to overcome this difficulty. In other words, the invention aims to devise a strip gummed paper and a process of making it which will produce a sheet that is substantially level.

The nature of the invention will be readily understood from the following descriptionwhen read in connection with the accompanying drawings, and the novel features will be particularly pointed out in the appended claims.

The. single figure of the accompanying drawing is a diagrammatic view, in perspec-. tive, illustrating a process of strip coating paper embodying the present invention.

Referring to the drawing, 2 designates a supply roll of paper from which a'continuous strip S is drawn. This strip travels over a roll 3 having raised peripheral. portions or rings 4 with which the paper is held in contact by means of another roll 5.

Strips of gum are applied to the paper by.

the rings 4, this gum consisting of glue, dextrine, or any other suitable substance, and

a tank 6. A feed roll 7 is partially submerged in the liquid gum and transfers it to an intermediate roller 8. usually covered with felt, which, in

turn, delivers the gum to the rings 4 of the strip roll 3, this arrangement ensuring the le to have that the gummed mar-- it is particularly.

application of a limited and uniform quant1ty of gum to the paper. The strips of gum so applled are indicated at G.

The papernext runs over a roll 9 which forces the paper in contact with another strip roll 10, similar to the roll 3, but cut away at the parts which otherwise would engage the gummed surface of the paper. This roll also has raised annular portions 12 that run in contact with the ungummed sections of the paper and apply to these portlons a coating of a hon-adhesive material,

such for example, as a mixture of clay or kaolin with casein or starch. Practically any filler mixed with a suitable size or binder will answer for this purpose. This mixture may also be. colored, if desired. The non-adhesive coating material is applied in liquid form, and for this purpose is mixed with. water, the mixture being fed to the strip roll 10 in substantially the same manner that the gum is fed to the strip roll 3. That is, the non-adhesive coating material is poured into a tank or trough 13 in which a feed roll 14 revolves, this roll transferring the material to a felt covered roll 15 which, in turn, delivers it to the raised surfaces 12 of the strip roll 10.

From the latter roll the strip of paper travels over guide rolls 16 and 17. and is then wound up in a roll 18, suitable time being allowed in the travel of the strip to enable the coating to dry. Or the strip may be run over one or more heated rolls to hasten the drying operation.

With the arrangement above described the coating of non-adhesive material applied to the paper is substantially equal in thickness to the coating of gum. Where, due to the nature of the materials handled, a more ao-- curate control is necessary than can be obtained by the arrangement shown, it may be necessary to use scrapers or doctors on the feed rolls, as will be readily understood by those skilled in this art.

It will be observed that a portion of the paper is coated with gum and that the-remaining ungummed surface is coated with an equal thickness of a non-adhesive material. The coated sheet, therefore, is of a substantially uniform thickness throughout its entire area. Consequently, when this sheet is cut up into smaller sheets of the proper size for labels, stickers, posters, or

Z in it is level.

the like, and these pieces are stacked for printing, the stack will be substantially level at all heights because each individual sheet The difliculty which has been encountered heretofore in printing a strip gummed paper is thus effectually overcome.

As shown, the gum is applied to the paper in strips G and these strips are separated from each other by non-adhesive coating strips 0. It willfbe understood, however, that the-particular way in which the coatings are applied, the widths of the strips, and the like, will be determined by the use which is to be ma'de'of the paper. While, therefore, I have herein shown and described a typical arrangement for practicin the present invention, it will be understooc that the process provided by this invention may be practiced in other Ways.

Having thus described my invention, what I desire to claim as new is: I 1. That improvement in processes of strip coating paper which consists in applying coatings of substantially equal thickness of adhesive and non-adhesive material to adj acent portions of the paper.

2. That improvement in processes of strip coating paper which consists in applying adhesive material in spaced strips to the surface of the paper, and then coating the intervening surface of the paper with a non-adhesive material.

3. That improvement in the process of strip coating paper which consists in coating a strip 'of vthe surface of the paper with adhesive material and applying to the surface of the paper adjacent to said strip a coating of non-adhesive material of substantially the same thickness as said adhesive coating.

4. An article of the character described comprising a sheet of paper having one face thereof partially covered by a strip coating of gum and other portions of said face partially covered with a coating of non-adhesive material, both of said coatings being of substantially the same thickness.

5. An article of the character described consisting of a sheet of paper having, on one face thereof, strip coatings of adhesive and non-adhesive material, said coatings being of substantially the same thickness.

6. An article of the character described comprising a sheet of paper having a strip coating of gum on one face thereof, and a coating of non-adhesive material substantially covering the ungummed surface of said face, both of said coatings being of substantially the same thickness.

WILLIAM W. MOLAURIN. 

